Online PHP editor | output for f63nj

@ 2022-05-26T15:04:03Z

<?php

class Foo
{
    /** @var array<string, string> */
	private array $stuff = ["foo" => "foo"];
    
    /**
    * @param non-empty-list<string> $param
    * @return string
    */
    public function foo(array $param)
    {
        $arr = &$this->stuff[$param[0]];	// This seems to cause Psalm to blackout.
        var_dump($this->stuff);
        /** @var string */
        $x = $arr;
        /** @psalm-trace $x, $arr */;
        
        // This trace doesn't work, and $x's type appears to be mixed at this point.
        /** @psalm-trace $x */
        return $x;
    }
}

$foo = new Foo();
$foo->foo(["foo"]);
$foo->foo(["bar"]);

Output for 8.0.1 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7: array(1) { ["foo"]=> &string(3) "foo" } array(2) { ["foo"]=> string(3) "foo" ["bar"]=> &NULL }
Output for 7.4.0 - 7.4.33: Deprecated: Methods with the same name as their class will not be constructors in a future version of PHP; Foo has a deprecated constructor in /in/f63nj on line 3 Fatal error: Uncaught ArgumentCountError: Too few arguments to function Foo::foo(), 0 passed in /in/f63nj on line 26 and exactly 1 expected in /in/f63nj:12 Stack trace: #0 /in/f63nj(26): Foo->foo() #1 {main} thrown in /in/f63nj on line 12
Process exited with code 255.

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